CN1386604A - Auger drill - Google Patents
Auger drill Download PDFInfo
- Publication number
- CN1386604A CN1386604A CN02119911.6A CN02119911A CN1386604A CN 1386604 A CN1386604 A CN 1386604A CN 02119911 A CN02119911 A CN 02119911A CN 1386604 A CN1386604 A CN 1386604A
- Authority
- CN
- China
- Prior art keywords
- auger
- spiral
- drilling rod
- drill bit
- drillstock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 13
- 238000005219 brazing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000003190 viscoelastic substance Substances 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
- B28D1/146—Tools therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/10—Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/75—Stone, rock or concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/02—Connections between shanks and removable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/003—Details relating to chucks with radially movable locking elements
- B25D2217/0034—Details of shank profiles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Abstract
A twist drill including a spiral-forming hollow shaft having a spiral-shaped inner surface, and drilling head(5) and shank (6) connected with the shaft (3) at its opposite ends, respectively; and a method for forming such a twist drill are also disclosed.
Description
Technical field
The present invention relates to a kind of material of worn stone and similar stone such as auger of concrete and brick setting of being used for, it is subjected to the effect of torsional load and shock loading.
Background technology
The auger of the above-mentioned type and hand-held power tool, automatic power instrument and remote controlled powered instrument are used in building industry for example.
Auger comprises that a drilling rod that forms a spiral at least in part, one are formed by hard material, or the insert that hard material forms is housed, be used for removing the drill bit of rock substance, and at a drillstock of the other end relative with an end of fixed drill bit of drilling rod.Usually drag groove and locked groove on the drillstock, be received in the power tool and its co-rotation, and can carry out limited axially-movable with respect to power tool.It finishes some special functions when needs, during such as importing cooling fluid or dust out, then will use special drillstock.
Generally, make the drilling rod and the drillstock that have spiral at least integrally formed by processing or being shaped as cylindric blank.Because the length of required brill and the wide range of diameter, so the manufacturing both expensive of auger.In addition, the weight of the auger of being made by solid material is also very heavy, and is when it is applied to building industry, owing to need a large amount of different augers, also can Yin Qitai heavy and make difficult.
French Patent (FRP) No.1083326 has described a kind of earth borer, and its drilling rod is formed by a pipe, is furnished with the spiral bar that the metallic plate by bending forms on the pipe.
European patent EP 541 942B1 have described a kind of drill pipe, are the disposable instruments that is used for mining.This drill pipe comprises drill bit and hollow axis pole that forms the very steep spiral of lift angle of a band hard material insert, and it is made into integration with cold-shaping steel.
U.S. Patent No. 6102142 has been described a kind of drilling rod, has the annulus of being made by elastomeric material.
One object of the present invention is to provide an auger be used light of hand-held power tool and efficiently.
Another object of the present invention is to provide a kind of auger of can easy method producing various different lengths and diameter.
Summary of the invention
Above-mentioned and other purpose of the present invention will obviously be found out hereinafter, this purpose realizes by a kind of auger, it comprises: a hollow drill that forms a spiral at least in part and have a helical form inner surface, a drill bit that has the hard material bite at an end of drilling rod, and, be used for auger is fixed to handheld tool co-rotation and can do limited axial displacement therein with it at a drillstock of the relative other end of drilling rod.
Hollow drill inside and outside all has spiral, and it is very light, when itself and rotary impact handheld tool are used, can with impact and torsional pulse load amalgamation on bite, thereby cut away material better.Form the cored screw shape drilling rod with helical form inner surface by tubular blank is processed, this allows to use man-hour the cold roll of tubulose to make drilling rod adding.Drill bit and drillstock are by welding, brazing or similarly be connected the two ends that technology is fixed on drilling rod, and described technology can be carried out different combinations.Manufacturing process allows to adopt special drillstock, to get out thing by hollow drill importing cold cut liquid or sucking-off.
Advantageously, the initial angle of spiral is steep, surpasses 45 degree.This allows to the enough big axial impact component of drilling rod transmission.In addition, advantageously, adopt three-way spiral rather than traditional bifilar helix, can guarantee efficient to remove the material that gets out, and drill guide in boring well.
Advantageously, the cross section outline of spiral becomes the triangle symmetry with respect to the axis that bores.This can make drilling rod that very high section bending modulus (flexural sectionmodulus) is all arranged on all directions, and can guarantee that auger is evenly guided along the wall of a borehole.
Advantageously, drill bit is with respect to the bite axis triangle symmetry about boring similarly.This has guaranteed the symmetrical transition to spiral.
Advantageously, a helicla flute on the cross section outline of spiral has formed a depression profile, and this has increased the spiral fluted cross section, thereby has increased delivery volume.
Advantageously, in the radially outer zone of spiral, the spiral bar that is web-like is extended between each helicla flute, and therefore, helicla flute sees internally and seal that this has reduced crevice corrosion therebetween.
Advantageously, the circumferencial direction thickness of radial oriented spiral bar is between to two times of hollow drill thickness.
Advantageously, the radius in the inscribe week of described cross section outline is 0.4 to 0.6 times of the radius of spin, and this can guarantee to transmit sufficient turning moment on fully big helicla flute cross section.
Advantageously, in hollow auger spindle, fill a kind of hollow viscoelastic material that becomes under the action of the centrifugal, can produce damping effect auger.Hollow drill is made by the material of vibrationproof, by filling viscoelastic material therein, can realize the best damping or the filter effect of main wave mode that drilling rod is produced in drilling process.Employed viscoplasticity packing material has the high damping value in the dominant operating temperature range of the frequency range of main wave mode.
Auger comprises a hollow drill that forms a spiral at least in part and have a helical form inner surface, the drill bit that has the hard material bite at an end of drilling rod, and a drillstock, be used for auger is fixed to handheld tool co-rotation and can do limited axial displacement therein with it.Its making step is as follows:
The first step, the tubular blank that the most handy three cheek cold rolls (three-cheek cold rollers) processing metal or alloy are made is to form internal and external screw on blank; In second step, the blank that internal and external screw is arranged is formed drilling rod by predetermined length cutting; In the 3rd step, preferably, drill bit and the drillstock that is shaped separately is installed at the two ends of drilling rod by the method for TIG welding (TIG welding), laser weld or brazing.
Aforesaid manufacture craft has guaranteed to use the drill bit of standard and the auger that drillstock can be produced different size and random length.
Advantageously, in the step in the end, in sintering " undressed " (" green ") drill bit, utilize brazing that drill bit and drilling rod as " untreated " (" green ") workpiece are linked together.
New feature of the present invention is described in the claims.After people read hereinafter specific implementation method and accompanying drawing, will understand structure of the present invention, mode of operation and other advantage and purpose well.
Description of drawings
Accompanying drawing comprises:
Fig. 1: the side view of auger of the present invention;
Fig. 2: the cross-sectional view of being done along the II-II line among Fig. 1.
The specific embodiment
Auger 1 shown in the drawings of the present invention comprises: a hollow drill 3 that forms a spiral 2 and a helical form inner surface is arranged; At drill bit 5 of an end of drilling rod with at a drillstock 6 of drilling rod 3 other ends.Drill bit 5 is symmetrical with respect to the bite 4 of its hard material.Drag groove (entraining grooves) 7 and locked groove 8 on the drillstock, its shape can make drillstock cooperate by the drillstock 6 landform lockings appropriate with the interlocking of drilling rod (formlockingly) that formed by circumference joint pin 9 and 9 ' with drilling rod 3.The steep spiral of the initial lift angle α of three-way spiralization 50 degree, hollow drill 3 is being filled owing to centrifugal motion becomes hollow visco-elastic material 10.
As shown in Figure 2: the cross section outline of spiral 2 is the triangle symmetry about the axis A that bores.Helicla flute 11 profiles on the cross section outline of spiral 2 have formed one group of concave curve.Spiral bar 12 along web-like stretches out each helicla flute 11 in the radially outer zone of spiral.Spiral bar 12 is between two helicla flutes 11, and its thickness D is identical with the wall thickness W of drilling rod 3.The inscribed circle radius K of the cross section outline of spiral 2 is half of the radius of spin.
Although described the present invention and concrete implementing method thereof herein.But this is just to an explanation of the present invention.The invention is not restricted to this.Many modifications of making about the present invention are conspicuous for those skilled in the art.Therefore the invention is not restricted to method described herein and details.Modification and the replacement carried out in the scope that the present invention includes all spirit that claim embodied hereinafter and covered.
Claims (14)
1. auger, comprise a hollow drill that forms a spiral (2) at least in part and have a helical form inner surface, at the drill bit (5) of the bite that has hard material (4) of an end of drilling rod (3), and a drillstock, be used for auger is fixed to handheld tool also can do limited axial displacement therein with its co-rotation.
2. the auger in the claim 1, wherein, spiral (2) forms steep spiral.
3. the auger in the claim 2, wherein, spiral (2) is three-way spiral.
4. the auger in the claim 3, wherein, axis (A) the triangle symmetry of the cross section outline of spiral (2) about boring.
5. the auger in the claim 4, wherein, drill bit is with respect to axis (A) the triangle symmetry of bite (4) about boring.
6. the auger in the claim 1, wherein, the cross section outline of spiral (2) comprises one group of helicla flute, each spiral fluted profile forms a concave curve.
7. the auger in the claim 6, wherein, each helicla flute (11) stretches out along corresponding web-like spiral bar (12) in the radially outer zone of spiral (2), and spiral bar is between two corresponding helicla flutes.
8. the auger in the claim 1, wherein, hollow drill (3) has been filled viscoelastic material (10) at least in part.
9. the auger in the claim 8, wherein, the described viscoelastic material (10) of filling drilling rod has the high damping value in the dominant operating temperature range of frequency range of the main wave mode of described drilling rod (3).
10. the auger in the claim 9, wherein, radially the thickness (D) of the circumferencial direction of the spiral bar of Yan Shening (12) be drilling rod (3) thickness (W) one to twice.
11. the auger in the claim 6, wherein, the inscribed circle radius of the cross section outline of spiral (2) is 0.4 to 0.6 times of the radius of spin.
12. make a kind of method of auger.This auger comprises a hollow drill that forms a spiral (2) at least in part and have a helical form inner surface; The drill bit that has hard material bite (4) at an end of drilling rod (3); And a drillstock, being used for auger is fixed to handheld tool also can do limited axial displacement therein with its co-rotation, this method may further comprise the steps:
The tubular blank that metal or alloy is made shapes, to form internal and external screw (2) thereon;
The blank that internal and external screw is arranged is formed drilling rod (3) by predetermined length cutting;
Drill bit that will be shaped separately and drillstock (6) are fixedly attached to the two ends of drilling rod (3) respectively.
13. the manufacture method in the claim 12, wherein, the described step that shapes comprises and uses the three cheek cold rolls described internal and external screw that is shaped; Described Connection Step comprises and uses a kind of in TIG welding, laser weld and the brazing, connects drill bit and drillstock at the two ends of drilling rod.
14. the manufacture method in the claim 12, wherein, drill bit forms " undressed " workpiece; Wherein, described Connection Step is included in the process of sintering " undressed " (" green ") drill bit and with brazing " undressed " (" green ") drill bit is connected on the drilling rod (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/859,871 US6601659B2 (en) | 2001-05-17 | 2001-05-17 | Twist drill |
| US09/859,871 | 2001-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1386604A true CN1386604A (en) | 2002-12-25 |
| CN1266368C CN1266368C (en) | 2006-07-26 |
Family
ID=25331937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02119911.6A Expired - Fee Related CN1266368C (en) | 2001-05-17 | 2002-05-15 | Auger drill |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6601659B2 (en) |
| EP (1) | EP1260338B1 (en) |
| JP (1) | JP4366044B2 (en) |
| CN (1) | CN1266368C (en) |
| DE (1) | DE60238655D1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966603A (en) * | 2009-07-27 | 2011-02-09 | 喜利得股份公司 | Driller and method for its manufacture |
| CN105209190A (en) * | 2013-05-06 | 2015-12-30 | 喜利得股份公司 | Twist drill and production method |
| CN105312638A (en) * | 2014-09-25 | 2016-02-10 | 深圳市金洲精工科技股份有限公司 | Drill bit special for printed circuit board (PCB) and machining method thereof |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7610194B2 (en) * | 2002-07-18 | 2009-10-27 | Tegic Communications, Inc. | Dynamic database reordering system |
| US20060115338A1 (en) * | 2004-11-26 | 2006-06-01 | Tsan-Zan Yam | Method for making miniature tri-blade drill and structure of the same |
| CN100368115C (en) * | 2005-04-10 | 2008-02-13 | 江苏飞达工具股份有限公司 | Method for improving service life of rolled spiral drill |
| DE102006000208A1 (en) * | 2006-04-28 | 2007-10-31 | Hilti Ag | Rotary hammer drill with four-turn drill bit shank |
| US8702357B2 (en) | 2009-02-10 | 2014-04-22 | Kennametal Inc. | Multi-piece drill head and drill including the same |
| US8827606B2 (en) | 2009-02-10 | 2014-09-09 | Kennametal Inc. | Multi-piece drill head and drill including the same |
| DE102009003288A1 (en) * | 2009-05-20 | 2010-11-25 | Hilti Aktiengesellschaft | drill |
| DE102010002167A1 (en) * | 2010-02-22 | 2011-08-25 | Hilti Aktiengesellschaft | Manufacturing method for an insertion end |
| US9539652B2 (en) | 2010-04-30 | 2017-01-10 | Kennametal Inc. | Rotary cutting tool having PCD cutting tip |
| GB2492583A (en) | 2011-07-06 | 2013-01-09 | Sandvik Intellectual Property | Twist drill for composite materials |
| US8926237B2 (en) | 2011-07-11 | 2015-01-06 | Kennametal Inc. | Multi-piece twist drill head and twist drill including the same |
| US9340269B2 (en) * | 2013-05-16 | 2016-05-17 | The Regents Of The University Of Michigan | Viscoelastic dampener |
| EP3106253A1 (en) * | 2015-06-17 | 2016-12-21 | HILTI Aktiengesellschaft | Driller and method for its manufacture |
| US9981406B2 (en) * | 2015-06-25 | 2018-05-29 | Black & Decker Inc. | Drill bit |
| DE102016122063A1 (en) * | 2016-11-16 | 2018-05-17 | Csm Maschinen Gmbh | Press-welded tool |
| KR102115675B1 (en) * | 2018-12-27 | 2020-05-27 | 한국야금 주식회사 | Brazing indexable drill |
| US11090737B2 (en) * | 2019-08-29 | 2021-08-17 | Kennametal Inc. | Rotary cutting tool with tunable vibration absorber assembly for suppressing torsional vibration |
| KR102568271B1 (en) * | 2021-10-25 | 2023-08-22 | 한국생산기술연구원 | Cutting tool having a cooling path inside the tool |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2246418A (en) * | 1938-03-14 | 1941-06-17 | Union Oil Co | Art of well drilling |
| US2404049A (en) * | 1944-08-30 | 1946-07-16 | Franklin G Gepfert | Drill |
| US2935906A (en) * | 1957-07-01 | 1960-05-10 | Andreasson Rudolf William | Oil tube drill |
| DE2064024B2 (en) * | 1970-12-28 | 1973-02-08 | Gebruder Heller, 2801 Uphusen | DRILL |
| IL62342A (en) * | 1981-03-10 | 1983-12-30 | Iscar Ltd | Method of bonding cemented carbide bodies and composite hard metal products manufactured thereby |
| US4830000A (en) * | 1987-12-31 | 1989-05-16 | Aspen Laboratories, Inc. | Surgical drill |
| DE19707115A1 (en) * | 1997-02-22 | 1998-08-27 | Hilti Ag | Drilling and / or chisel tools |
| DE19856986A1 (en) * | 1997-12-22 | 1999-07-08 | Komet Stahlhalter Werkzeug | Production of drilling tool |
| US6126367A (en) * | 1998-03-31 | 2000-10-03 | Reed; Gary Jack | Precision drill bit |
-
2001
- 2001-05-17 US US09/859,871 patent/US6601659B2/en not_active Expired - Fee Related
-
2002
- 2002-05-06 DE DE60238655T patent/DE60238655D1/en not_active Expired - Lifetime
- 2002-05-06 EP EP02405364A patent/EP1260338B1/en not_active Expired - Fee Related
- 2002-05-15 CN CN02119911.6A patent/CN1266368C/en not_active Expired - Fee Related
- 2002-05-16 JP JP2002141608A patent/JP4366044B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966603A (en) * | 2009-07-27 | 2011-02-09 | 喜利得股份公司 | Driller and method for its manufacture |
| CN101966603B (en) * | 2009-07-27 | 2015-09-23 | 喜利得股份公司 | Drilling tool and manufacture method thereof |
| CN105209190A (en) * | 2013-05-06 | 2015-12-30 | 喜利得股份公司 | Twist drill and production method |
| CN105209190B (en) * | 2013-05-06 | 2017-08-25 | 喜利得股份公司 | Fluted drill and manufacture method |
| US10245657B2 (en) | 2013-05-06 | 2019-04-02 | Hilti Aktiengesellschaft | Twist drill and production method |
| CN105312638A (en) * | 2014-09-25 | 2016-02-10 | 深圳市金洲精工科技股份有限公司 | Drill bit special for printed circuit board (PCB) and machining method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60238655D1 (en) | 2011-02-03 |
| US20020170752A1 (en) | 2002-11-21 |
| JP2003011010A (en) | 2003-01-15 |
| EP1260338A3 (en) | 2006-01-18 |
| JP4366044B2 (en) | 2009-11-18 |
| EP1260338B1 (en) | 2010-12-22 |
| CN1266368C (en) | 2006-07-26 |
| EP1260338A2 (en) | 2002-11-27 |
| US6601659B2 (en) | 2003-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
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